Iron-carbon (Steel) Phase Diagram w/ Pro-Eutectoid Step

A Materials Science problem that calculates the proeutectoid ferrite,,eutectoid ferrite, and cementite weight fractions and masses of a 0.3% C steel as it cools from austenite. Includes detailed explanation and two different examples of the lever rule. It also explains the concepts of eutectic and euctectoid.
Similar to problems from "Phase Diagram" chapters of Callister.

[@DavidTube5]

This makes things a bit clearer than they were in class.

[@vic4955]

GOOD JOB

[@EngineeringandDesignSolutions]

You are very welcome! I'd like to do some stuff for Khan, especially for engineering, as they have stopped short of these topics.

[@1234SLUR]

better than that spoon me video :#

[@Dmiudo]

Very clear and straight to the point explanations. Helped out a lot 👌

[@mauricaoo]

Very good explanation. Thanks.

[@zakariyajabri]

thanx man.. u made my lide easier

[@preetammukherjee623]

is this figure taken from W.D.callister??? :) but you have taught very well.. :)

[@TotalVikingPower]

This is one of the topics Khan haven't made yet.
The definitions you give is really great. Speak slow and precise. Thanks.

[@niteshk9060]

It was helpful. Thanks

[@erayboz6956]

saved my ***

[@shameseldeen94]

thanks very very much

[@bb-lj2ti]

thanks but i bet you have a hard time to write all of that, recommend to buy an ipad

[@jorgerevueltamoreno1902]

very well explained thank you very much!!!!!!

[@TehMaxLightning]

When you calculate pro-eutectoid ferrite, your tie line went passed the boundary (solidus). If instead your tie line stopped at the boundary, what would that indicate instead? Or does it not have any meaning?

[@zachoberholzer9839]

THANKS!!!!!!!!!!!!!!!!

[@Mannycheungrulez]

for my question, it says consider 1.0 kg of austenite, is there a difference in the steps?

[@blackheart6897]

Not at all

[@blackheart6897]

Can't thank you enough

[@LeneHovlandFosse]

never mind, but what does this say : Wα∙T=Wγ∙U ???

[@EngineeringandDesignSolutions]

+Lene Fosse
Where do you see it? It looks like a statement of the lever rule.

[@TotalVikingPower]

* you Speak slow and precise.

[@Sanjeevkumar-gb9rn]

Thank you Sir..

[@wraster07hp36]

Thanks

[@ZeoGarcia]

ty sir

[@a.g4521]

so helpful thanks

[@chomp9513]

thanks it helped me a lot

[@Dosalt]

thanks a lot

[@0568588527]

Thank you so so much that helped out alot

[@ahmedmoha1110]

U saved me a lot of time
You are awesome

[@EngineeringandDesignSolutions]

You're very welcome. Thanks for watching and commenting!

[@LeneHovlandFosse]

Where did 0.76 come from?

[@katherinehiggins2861]

percentage carbon at the eutectoid point

[@EngineeringandDesignSolutions]

+Lene Fosse
Thanks, Katherine.
0.76% is the point at which carbon is eutectoid in iron in this composition. It is shown clearly on the diagram, but maybe I should have stated it explicitly.

[@samuelbrightamankwahboadi1718]

It really helped.

[@EngineeringandDesignSolutions]

+Samuel Bright Amankwah Boadi
You are most welcome!

[@nicholasvolkenant8386]

In part (a) you refer to it as the pro-eutectoid Ferrite. Is the Austenite you solve for technically pro-eutectoid Austenite in part (a) as well? Or is it not because the beginning microstructure is pure Austenite?

[@EngineeringandDesignSolutions]

+Nicholas Volkenant
"Pro-Eutectoid Ferrite" is in contrast to the "Eutectoid Ferrite". PEF is Ferrite made before the eutectoid point, whereas EF is made at the eutectoid point. Austenite is not developed at either point and is actually transformed into other constituents as the temperature drops. Thus, there is no "pro-eutectoid Austenite", nor is there "eutectoid Austenite" because Austenite is not produced in these locations (assuming a drop in temperature).
I hope that helps.

[@nicholasvolkenant8386]

+Engineering and Design Solutions
Perfect, that is what I had expected. That helps, thank you for the clarification.

[@EngineeringandDesignSolutions]

+Nicholas Volkenant
You are very welcome!